/**
 * @Author 12629
 * @Description：
 */
public class TestDemo2 {
    public static void main(String[] args) {
        int a = 10;
        int a2 = 12;
        int a_3 = 13;
        int a$4 = 14;

        //int 2b = 10; 不能以数字开头
        //int if = 10;

        int maxNum = 10;

        int main = 100;
        System.out.println(main);

        int ___ = 100;
        int __________ = 100;


    }
}